61671550 has 12 divisors (see below), whose sum is σ = 114709176. Its totient is φ = 24668600.

The previous prime is 61671541. The next prime is 61671551. The reversal of 61671550 is 5517616.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61671551) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 616666 + ... + 616765.

It is an arithmetic number, because the mean of its divisors is an integer number (9559098).

Almost surely, 2^61671550 is an apocalyptic number.

61671550 is a deficient number, since it is larger than the sum of its proper divisors (53037626).

61671550 is a wasteful number, since it uses less digits than its factorization.

61671550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1233443 (or 1233438 counting only the distinct ones).

The product of its (nonzero) digits is 6300, while the sum is 31.

The square root of 61671550 is about 7853.1235823715. The cubic root of 61671550 is about 395.0890148155.

The spelling of 61671550 in words is "sixty-one million, six hundred seventy-one thousand, five hundred fifty".